Visitors __________________(request) not to touch the exhibits(展品).
It’s no pleasure _________________(work) with you.
You can’t imagine what great trouble they have _________________(solve) the problem.
There are a lot of children ___________(play) on the playground.
It has been 3 years since he _________________(join) the army.
With so much work ________________(fill) my mind, I almost break down.
Alexander tried to get his work _________(recognize) in the medical circle.
While _______________(walk) the dog, I was careless and it got loose.
I am only able to look at nature through dirty curtains __________(hang) before very dusty windows.
Many people believe the English ______________(speak) on TV and the radio is standard English.